No idea what smart casual is
I suppose it depends but for me it’s something I usually wear to work instead of a suit or suit type trousers ..as I work in lots of companies their definitions also tend to change.
Chinos are probably mostly OK and with an ironed crease downtown the front …
Other than that I have little use for smart casual which is perhaps a bit sad …. after work and weekends I just wear shorts or craghoppers outdooors type … I say little as I had some smart cords and was going out for a infrequent meals last winter and found the cords I thought I was going to wear had a huge hole in the pocket.
The main point for me is they need to be comfy or I can just resort to a suit or suit trousers …having 6″ bunched round my waist or pulling at the thighs is just uncomfy
Glad to see I’m not alone though …. like I said my thighs aren’t really that big … I manage to use some medium knee pads fine it just seems casual cut trousers are really tight on the gluts and thighs compared to suit type trousers